.App {
  min-height: 100vh;
  background-color: #f5f5f5;
}

.header {
  background: white;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  padding: 15px 20px;
  margin-bottom: 20px;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header h1 {
  margin: 0;
  color: #333;
}

.user-info {
  display: flex;
  align-items: center;
  gap: 15px;
}

.sidebar {
  width: 250px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  padding: 20px;
  margin-right: 20px;
}

.main-content {
  flex: 1;
}

.layout {
  display: flex;
  max-width: 1200px;
  margin: 0 auto;
  gap: 20px;
}

.document-list {
  list-style: none;
  padding: 0;
}

.document-item {
  padding: 10px;
  margin-bottom: 10px;
  background: #f8f9fa;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.document-item:hover {
  background: #e9ecef;
}

.editor-container {
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  padding: 20px;
}

.editor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid #eee;
}

.editor-textarea {
  width: 100%;
  min-height: 400px;
  padding: 15px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 14px;
  line-height: 1.5;
  resize: vertical;
}

.user-list {
  margin-top: 20px;
}

.user-item {
  display: flex;
  align-items: center;
  padding: 5px 0;
}

.user-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #007bff;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 10px;
  font-size: 12px;
  font-weight: bold;
}